CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
CURRENT ASSETS:
Cash and cash equivalents	$ 48,330	$ 227,362
Marketable securities	678,691	574,266
Receivables, net	151,672	122,778
Inventories, net	145,741	139,002
Other current assets	37,089	53,659
Total current assets	1,061,523	1,117,067
PROPERTY AND EQUIPMENT:
Aircraft and rotable spares	9,006,084	8,774,570
Deposits on aircraft	85,000	65,612
Buildings, ground equipment and other	305,142	292,682
Total property and equipment, gross	9,396,226	9,132,864
Less-accumulated depreciation and amortization	(3,714,878)	(3,545,456)
Total property and equipment, net	5,681,348	5,587,408
OTHER ASSETS:
Operating lease right-of-use assets	79,873	87,731
Long-term receivables and other assets	351,339	347,661
Total other assets	431,212	435,392
Total assets	7,174,083	7,139,867
CURRENT LIABILITIES:
Current maturities of long-term debt	490,536	535,589
Accounts payable and accrued liabilities	556,805	527,351
Accrued salaries, wages and benefits	220,815	226,770
Current maturities of operating lease liabilities	20,071	20,467
Taxes other than income taxes	22,553	22,581
Other current liabilities	146,895	96,833
Total current liabilities	1,457,675	1,429,591
LONG-TERM DEBT, net of current maturities	2,006,034	2,136,786
DEFERRED INCOME TAXES PAYABLE	838,041	787,968
NONCURRENT OPERATING LEASE LIABILITIES	59,802	67,264
OTHER LONG-TERM LIABILITIES	230,111	309,477
COMMITMENTS AND CONTINGENCIES (Note 7)
STOCKHOLDERS' EQUITY:
Preferred stock, 5,000,000 shares authorized; none issued
Common stock, no par value, 120,000,000 shares authorized; 84,256,840 and 83,638,680 shares issued as of June 30, 2025, and December 31, 2024, respectively	788,280	777,090
Retained earnings	2,814,993	2,594,173
Treasury stock, at cost, 43,886,565 and 43,310,324 shares as of June 30, 2025, and December 31, 2024, respectively	(1,020,870)	(962,650)
Accumulated other comprehensive income	17	168
Total stockholders' equity	2,582,420	2,408,781
Total liabilities and stockholders' equity	$ 7,174,083	$ 7,139,867